A Riku Allies (and changelings) Tribal EDH deck
The idea here is to get out a bunch of Allies (and changelings) and to use copy and clone effects to make them go wild. Murasa Pyromancer is a big shot here, as is Tajuru Archer to a lesser extent. Descendant's Path and Call to the Kindred can build up a fair army when paired with changelings, and can still do reasonably on an Ally.
There is also a fair amount of flickering to get the most out of the ETB effects, and some +1/+1 counter synergies.
This is designed to be on the low end of the cutthroat spectrum, though it can get a little out of hand in a meta with few sweepers. With sweepers, it needs to play a little more carefully and not dump everything into play too quickly. It is a creature-based strategy though, so it's probably to be expected.
What this deck lacks is probably reliable card-advantage and hand-fixing. There are a couple of splashy big draws, but nothing that really smooths the deck, so it's designed with a bit of variance in there. There probably could be some library manipulation added if that was a direction to go in.
There also aren't any big game-ending cards or combos in there. This is somewhat by design, as the strategy I had in mind was just to steadily build up an ally army, but it's concievable that Overrun effects or Genesis Wave might be warranted.
Removing a couple cards I feel are underperformers. Some of these are probably borderline, but I am favoring change over constancy, so I leave myself the option of adding some of these back later.
I'm adding in a bit of (minor) non-ally tribal for changeling fun. Most egregious here is probably Seshiro, but we'll see how that works out. Also adding in a little card draw and some more answers, and adjusting the land ratio very slightly since I completed my set of Shocklands.
Awesome idea and very well constructed. Looks pretty fun and deadly.
I know she isn't an ally, but with all your +1 counter shenanigans, Prime Speaker Zegana can generate some insane draw power, especially with your flicker effects.
I considered Xenograft, but I wanted to intentionally avoid the Xenograft/Turntimber Ranger combo.
Shared Animosity may be worth a look, though in my experience I'm not attacking with a large number of creatures as much as a few big ones.
yeah, i wouldn't suggest the animosity unless you ran xenograft. looks liek you're avoiding splinter twin +Deceiver Exarch as well.